Multiphase Science and Technology A Quarterly

ISSN for PRINT: 0276-1459

For Online Access

Best Paper Award Selection - Editorial Board Site

2002, Volume14

Issue 3

64 pages

Issue price - $140.00

M. L.-J. Levac
Department of Mechanical and Industrial Engineering, University of Manitoba, Winnipeg, Manitoba, Canada

H. M. Soliman
Department of Mechanical and Industrial Engineering, University of Manitoba, Winnipeg, Manitoba, Canada

B. J. Azzopardi
Department of Chemical, Environmental and Mining Engineering, The University of Nottingham, University Park, Nottingham NG7 2RD, England

G. E. Sims
Department of Mechanical and Industrial Engineering, University of Manitoba, Winnipeg, Manitoba, Canada

A study was conducted in order to assess the state of the art in predicting the pressure changes during two-phase flow in horizontal dividing T-junctions. A database was established from data generated at various research laboratories. This database included results for air-water and steam-water mixtures, pressures from near atmospheric to 10 MPa (100 bar), equal-sided and reduced junctions, wide ranges of the inlet gas and liquid superficial velocities, and the full spectrum of inlet flow regimes. Seven empirical models were considered in the present study; all of which include equations for predicting the pressure changes at the junction. It is demonstrated that none of these models is capable of good prediction over the whole range covered by the database. Some models produced good predictions for the data sets from which these models were developed, but large deviations against other data sets. Finally, the database was divided into segments according to the inlet flow regime and it is shown that, in most instances, it is possible to recommend specific models for predicting the pressure changes associated with each regime with good accuracy.

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